A kinetic evaluation of anaerobic treatment of swine wastewater at two temperatures in a temperate climate zone |
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Authors: | Lim Seung Joo Fox Peter |
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Institution: | Department of Civil, Environmental, and Sustainable Engineering, Arizona State University, Tempe, AZ 85287, USA |
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Abstract: | A static granular bed reactor (SGBR) was used to treat swine wastewater at 24 and 16 °C. At 24 °C, the organic loading rate (OLR) was 0.7-5.4 kg COD/m3 day and the average chemical oxygen demand (COD) removal efficiency was 88.5%, respectively. Meanwhile, at 16 °C, the OLR was 1.6-4.0 kg COD/m3 day and the average COD removal efficiency was 68.0%, respectively. The SGBR acted as a bioreactor as well as a biofilter. After backwashing, the recovery of COD removal was not a function of an OLR but recovery time, while that of TSS removal was not a function of either recovery time or the OLR. The maximum substrate utilization rate (kmax) ratio was 1.89 between 24 and 16 °C, and the half velocity constant (Ks) ratio was 1.22, and the maximum specific growth rate (μmax) ratio was 4.71. In addition, the temperature-activity coefficient in this study was determined to be 1.09. |
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Keywords: | Swine wastewater Bioreactor Biofilter Granule Static granular bed reactor |
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